The picture is later, but measurements show no "settle", exact same height the day after they were installed to today. I have always questioned how steel springs with a rating and specified height would "settle". The stock springs don't settle. If anything, I'd think any "settling" is from the way they are installed, isolator position, etc. If properly installed, springs should not "settle"
Every spring made in-house is pre-set several times in a spring compressor, that is, compressed so all the coils are touching. This gives the spring a permanent set and ensures it will not settle during its service life. In production, a spring is actually made to a longer free, or uncompressed, length than required because the spring gets shorter during the setting process, thus bringing it down to specifications. Pre-setting is time consuming, though, so many spring manufacturers will skip it altogether. Once Eibach pre-sets a lot of springs (about 100), several are randomly selected to go through quality control, then the bulk go to powdercoating and labeling.